Optical lens plus heating defogging structure

Abstract

The utility model discloses an optical lens outer heating defogging structure, include: annular semiconductor refrigeration piece is used for to lens cooling, copper foil heat conduction pad is contacted with lens, the utility model discloses a design through annular semiconductor refrigeration piece, copper foil heat conduction pad and control module etc. structure, bluetooth module connects terminal, and the user can input outdoor temperature and humidity parameter in advance on the terminal, and control module is accurate to the dew point calculation based on this parameter, drives annular semiconductor refrigeration piece refrigeration, and then passes through the copper foil heat conduction pad of excellent heat conduction performance and evenly transmits the cold quantity to the lens, makes the lens temperature in advance close to dew point, when the equipment from the warm indoor enters the cold outdoor, and the lens and the environment temperature difference greatly reduces, effectively avoids the water vapor in the air in the lens surface quick condensation, thoroughly solved the existing structure because of heating start -up delay resulting in dense fog cannot quick dispersion, the problem of imaging fuzzy, guarantees the equipment in temperature mutation scene under instantaneous clear imaging.

Description

Technical Field

[0001] This utility model belongs to the field of optical lens defogging technology, and more specifically, it relates to an external heating defogging structure for optical lenses. Background Technology

[0002] When optical lenses are used in outdoor shooting equipment, lens fogging severely affects image clarity and equipment reliability. Existing external heating defogging structures for optical lenses mostly employ a temperature threshold trigger mechanism, activating the heating component when the ambient temperature is detected to be below a set value. However, when the equipment is suddenly moved from a warm indoor environment to a cold outdoor environment, the temperature difference between the lens surface and the environment increases dramatically. Moisture in the air condenses rapidly, forming dense fog. Existing structures suffer from delayed temperature detection response and untimely heating activation, resulting in the fog not dissipating quickly, leading to blurred images and impacting equipment performance and user experience. As disclosed in the prior art, Chinese utility model patent CN120091464A discloses a heating de-icing and defogging structure and method for an optical lens. This invention includes a lens frame, an internal de-icing and defogging mechanism, a lens support fixedly mounted on the inner side of a limiting bracket, a temperature sensor and a humidity sensor fixedly mounted on the left side of the lens support, a transparent graphene heating film mounted on the outer surface of the lens, an electrode fixedly mounted inside the transparent graphene heating film, and a ring-shaped heating element snapped onto the outer surface of the lens. In this structure, because the lens cannot be pre-treated, there is a delay in temperature detection response and untimely heating in actual use, resulting in the inability to quickly dissipate dense fog, leading to blurred images and affecting equipment performance and user experience. Therefore, we propose an external heating defogging structure and method for an optical lens. Utility Model Content

[0003] The purpose of this invention is to solve the problems in the existing technology where, when the device is suddenly moved from a warm indoor environment to a cold outdoor environment, causing the lens to fog up, the temperature detection response of the existing structure is delayed, the heating is not started in time, and the dense fog cannot be quickly dissipated, resulting in blurred images and affecting the performance of the device and the user experience. Therefore, this invention proposes an external heating defogging structure and defogging method for optical lenses.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An external heating defogging structure for an optical lens includes: a lens frame in which a lens is installed; a mounting groove formed on the inner wall near one end of the lens frame; an annular semiconductor cooling chip installed inside the mounting groove for cooling the lens and reducing the temperature difference between the lens and the outdoor environment; the cold side of the annular semiconductor cooling chip is provided with a copper foil thermal pad, which contacts the lens for uniformly transferring the cooling energy of the annular semiconductor cooling chip to the lens; and a connecting seat installed on the bottom side of the lens frame, wherein the connecting seat is provided with a control mechanism for lens control.

[0005] Preferably, it also includes a heat sink, which is fixedly installed at the end of the frame, with one end of the heat sink pressed against the side of the annular thermoelectric cooler for heat transfer and dissipation from the hot surface of the annular thermoelectric cooler.

[0006] Preferably, it also includes a retaining ring, which is fixedly connected to the inner wall of the frame, and the side of the lens abuts against the side of the retaining ring.

[0007] Preferably, the fixing ring is provided with a first temperature sensor for lens temperature detection, and the detection end of the first temperature sensor is in contact with the lens.

[0008] Preferably, it also includes a PI heating film, which is installed on the inner wall of the frame and used to heat the inside of the frame to defog the lens. The inner wall of the frame is fixedly connected to a positioning ring for positioning the PI heating film, and the PI heating film is disposed between the positioning ring and the fixing ring.

[0009] Preferably, the control mechanism includes a detachable box, a sealing plate, a control module, a Bluetooth module, a first relay, and a second relay; The detachable box is located at the bottom of the connector, and the sealing plate is fixedly installed at the bottom of the detachable box. The control module, Bluetooth module, first relay and second relay are all fixedly installed on the inner wall of the detachable box. The first temperature sensor, Bluetooth module, first relay and second relay are all electrically connected to the control module. The first relay is electrically connected to the PI heating film, and the second relay is electrically connected to the annular semiconductor refrigeration chip.

[0010] Preferably, two sets of guide rails are symmetrically fixedly installed on the top of the detachable box. Both sets of guide rails are inserted into the interior of the connecting seat. Fixing screws are provided on both sides of the connecting seat. The threaded end of the fixing screw abuts against the guide rail for fixing the detachable box.

[0011] Preferably, it also includes a mounting cover, the heat sink has a clearance hole inside, the mounting cover is inserted into the clearance hole, and the surface of the mounting cover is in contact with the inner wall of the clearance hole, and the interior of the mounting cover is provided with a heat insulation layer for heat insulation.

[0012] Preferably, it further includes a mounting ring fixedly connected to the side of the mounting cover, wherein a cooling fan for heat dissipation of the heat sink is installed inside the mounting ring, and an air outlet is provided on the mounting ring for air discharge.

[0013] Technical effects and advantages of this utility model: The external heating defogging structure for optical lenses provided by this utility model has the following advantages compared with the prior art: This invention utilizes a design incorporating a ring-shaped semiconductor cooling chip, a copper foil thermal pad, and a control module. A Bluetooth module connects to the terminal, allowing users to input outdoor temperature and humidity parameters in advance. The control module accurately calculates the dew point based on these parameters and then drives the ring-shaped semiconductor cooling chip to cool the lens. The copper foil thermal pad, with its excellent thermal conductivity, evenly transfers the cooling energy to the lens, bringing its temperature closer to the dew point. When the device moves from a warm indoor environment to a cold outdoor environment, the temperature difference between the lens and the surroundings is significantly reduced, effectively preventing rapid condensation of moisture on the lens surface. This completely solves the problem of dense fog not dissipating quickly and blurry imaging caused by delayed heating in existing structures, ensuring clear imaging even in scenarios with sudden temperature changes. Attached Figure Description

[0014] Figure 1 This is one of the structural schematic diagrams of this utility model; Figure 2 This is the second structural schematic diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the heat sink and copper foil thermal pad of this utility model; Figure 5 This is a schematic diagram of the control mechanism structure of this utility model; Figure 6 This utility model Figure 3 Enlarged structural diagram of the central area.

[0015] In the diagram: 1. Frame; 2. Positioning ring; 3. PI heating film; 4. Fixing ring; 5. First temperature sensor; 6. Lens; 7. Mounting slot; 8. Heat sink; 9. Clearance hole; 10. Mounting cover; 11. Insulation layer; 12. Ring-shaped semiconductor cooling chip; 13. Copper foil thermal pad; 14. Mounting ring; 15. Air outlet; 16. Conical part; 17. Cooling fan; 18. Protective net; 19. Second temperature sensor; 20. Humidity sensor; 21. Connecting base; 22. Detachable box; 23. Sealing plate; 24. Control module; 25. Bluetooth module; 26. First relay; 27. Second relay; 28. Guide rail; 29. ​​Fixing screw. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the protection scope of this utility model.

[0017] This utility model provides, for example Figure 1-6 The optical lens external heating defogging structure shown includes: a lens frame 1, in which a lens 6 is installed; a mounting groove 7, formed on the inner wall near one end of the lens frame 1; an annular semiconductor cooling chip 12, installed inside the mounting groove 7, used to cool the lens 6 and reduce the temperature difference between the lens 6 and the outdoor environment; the cold side of the annular semiconductor cooling chip 12 is provided with a copper foil heat-conducting pad 13, which contacts the lens 6, for uniformly transferring the cooling energy of the annular semiconductor cooling chip 12 to the lens 6; and a connecting seat 21, installed on the bottom side of the lens frame 1, and the connecting seat 21 is provided with a control mechanism for controlling the lens 6.

[0018] In an optional embodiment, a heat sink 8 is also included. The heat sink 8 is fixedly installed at the end of the frame 1, and one end of the heat sink 8 is pressed against the side of the annular thermoelectric cooler 12 for heat transfer and dissipation of heat from the hot surface of the annular thermoelectric cooler 12.

[0019] It should be noted that the heat sink 8 is made of 6063 thermally conductive aluminum alloy with a thermal conductivity of 201 W / (m·K). One end of the heat sink 8 is tightly attached to the hot surface of the annular thermoelectric cooler 12 through thermally conductive silicone grease (thermal conductivity 5.0 W / (m·K)). The heat from the hot surface can be quickly conducted to the heat sink 8. Multiple sets of heat dissipation channels are evenly opened on the heat sink 8. The heat dissipation channels increase the contact area with the air, so as to better dissipate the heat from the hot surface of the annular thermoelectric cooler 12.

[0020] In an optional embodiment, a retaining ring 4 is also included, which is fixedly connected to the inner wall of the frame 1, and the side of the lens 6 abuts against the side of the retaining ring 4.

[0021] It should be noted that when installing the lens 6, the heat sink 8 uses the annular semiconductor cooling chip 12 and the copper foil thermal pad 13 to press the lens 6 against the fixing ring 4 to fix the lens 6.

[0022] In an optional embodiment: the inside of the retaining ring 4 is provided with a first temperature sensor 5 for detecting the temperature of the lens 6, and the detection end of the first temperature sensor 5 is in contact with the lens 6.

[0023] It should be noted that the first temperature sensor 5 is configured as follows: the first temperature sensor 5 can be a DS18B20 model, with a measurement range of -55℃ to 125℃ and an accuracy of ±0.5℃. It is used to collect the temperature of the lens 6 so as to correct the lens 6 temperature from being close to the dew point temperature, ensuring that the lens 6 temperature is always close to but not lower than the dew point temperature, thus fundamentally preventing fogging on the surface of the lens 6.

[0024] In an optional embodiment, a PI heating film 3 is also included. The PI heating film 3 is installed on the inner wall of the frame 1 and is used to heat the inside of the frame 1 to heat and defog the lens 6. A positioning ring 2 for positioning the PI heating film 3 is fixedly connected to the inner wall of the frame 1. The PI heating film 3 is located between the positioning ring 2 and the fixing ring 4.

[0025] It should be noted that the PI heating film 3 is made of polyimide material, with a thickness of 0.1mm, a heating power of 15W, and a working voltage of 12V. The PI heating film 3 has the characteristics of fast heating speed, uniform heating, and high temperature resistance. Before entering a warm room from a cold outdoor environment, the lens 6 is preheated by the PI heating film 3 to prevent the lens 6 from being too cold and causing dense fog, resulting in blurred images and affecting the performance of the equipment and the user experience.

[0026] In an optional embodiment: the control mechanism includes a detachable box 22, a sealing plate 23, a control module 24, a Bluetooth module 25, a first relay 26, and a second relay 27; The detachable box 22 is located at the bottom of the connector 21. The sealing plate 23 is fixedly installed at the bottom of the detachable box 22. The control module 24, Bluetooth module 25, first relay 26 and second relay 27 are all fixedly installed on the inner wall of the detachable box 22. The first temperature sensor 5, Bluetooth module 25, first relay 26 and second relay 27 are all electrically connected to the control module 24. The first relay 26 is electrically connected to the PI heating film 3 and the second relay 27 is electrically connected to the annular semiconductor cooling chip 12.

[0027] It should be noted that the core chip of the control module 24 is an STM32F103, which has multi-channel data acquisition, logic judgment and control output functions. The Bluetooth module 25, model HC-05, supports Bluetooth 4.0 protocol, transmission distance ≤10m, data transmission rate 1Mbps. The first relay 26, model SRD-05VDC-SL-C, controls the power supply of the PI heating film 3. The second relay 27 controls the power supply of the toroidal semiconductor cooling chip 12. The Bluetooth module 25 connects to the terminal, and the temperature data of the lens 6 can be sent to the terminal via the Bluetooth module 25. The terminal APP generates a temperature change curve, and the user can intuitively understand the changes in lens and environmental parameters through the curve, which is convenient for remote monitoring and advance adjustment of the defogging strategy.

[0028] In an optional embodiment: two sets of guide rails 28 are symmetrically fixedly installed on the top of the detachable box 22. Both sets of guide rails 28 are inserted into the interior of the connecting seat 21. Fixing screws 29 are provided on both sides of the connecting seat 21. The threaded end of the fixing screw 29 abuts against the guide rail 28 for fixing the detachable box 22.

[0029] It should be noted that the detachable box 22 can be disassembled and installed by means of the guide rail 28 and the fixing screw 29.

[0030] In an optional embodiment, the device further includes a mounting cover 10. The heat sink 8 has a clearance hole 9 inside. The mounting cover 10 is inserted into the clearance hole 9, and the surface of the mounting cover 10 contacts the inner wall of the clearance hole 9. The mounting cover 10 has a heat insulation layer 11 inside for heat insulation.

[0031] It should be noted that the mounting cover 10 is made of ABS engineering plastic with a high-temperature resistant insulating coating. The mounting cover 10 and the inner wall of the clearance hole 9 are sealed with a sealing ring to prevent dust and moisture from entering. The insulation layer 11 is made of aerogel insulation material with a thickness of 3mm and a thermal conductivity of 0.018W / (m・K). After the mounting cover 10 is installed inside the heat sink 8, it seals the clearance hole 9. In addition, the insulation layer 11 insulates the lens 6, which can effectively block the influence of the external ambient temperature on the inside of the frame 1. This creates a sealed and heat-insulating space between the insulation layer 11 and the lens 6, reducing energy loss during heating or cooling. In an optional embodiment, a mounting ring 14 is also included, which is fixedly connected to the side of the mounting cover 10. A cooling fan 17 for heat dissipation of the heat sink 8 is installed inside the mounting ring 14, and an air outlet 15 is provided on the mounting ring 14 for air discharge.

[0032] It should be noted that the cooling fan 17 is electrically connected to the control module 24, and a conical part 16 is fixedly connected to the side of the mounting cover 10. The cooling fan 17 can blow outside air to the conical part 16, and after being guided by the side of the conical part 16, the air passes through the air outlet 15 and blows to the heat sink 8 to dissipate heat from the heat sink 8. The mounting ring 14 is equipped with a protective net 18. The protective net 18 is made of stainless steel and has a mesh diameter of 1mm. The protective net 18 protects the cooling fan 17 and can effectively prevent foreign objects from entering the mounting cover 10 and touching the fan blades of the cooling fan 17, ensuring the stable operation of the cooling fan 17, and at the same time avoiding accidental contact by personnel and causing safety hazards. The frame 1 also includes a second temperature sensor 19 and a humidity sensor 20. The second temperature sensor 19 can be a model SHT30, with a measurement range of -40℃ to 125℃ and an accuracy of ±0.3℃. The humidity sensor 20 can also be a model SHT30, with a measurement range of 0-100%RH and an accuracy of ±2%RH. The second temperature sensor 19 and the humidity sensor 20 are both electrically connected to the control module 24. The second temperature sensor 19 can monitor the ambient temperature, and the humidity sensor 20 can monitor the ambient humidity and transmit the data to the control module 24. After receiving the data, the control module 24 will automatically calculate the dew point temperature according to the built-in dew point calculation formula (dew point temperature = (17.625×T) / (243.04+T)+ln(RH / 100), where T is the ambient temperature and RH is the relative humidity). Combined with the lens temperature data collected by the first temperature sensor 5, it will determine whether the defogging function needs to be activated: when the humidity reaches the set threshold (default 80%RH, which can be adjusted by the user via the terminal APP), the control module 24 will activate the dew point temperature. 4. Controlling the first relay 26 to close activates the PI heating film 3 to heat the lens 6, raising the lens temperature to 5-8°C above the dew point temperature, effectively dispelling fog on the lens surface. When the equipment moves from a warm room to a cold outdoor environment or vice versa, the second temperature sensor 19 detects a sudden change in the ambient temperature (temperature change rate ≥ 5°C / min). The control module 24 adjusts the control strategy according to the direction of temperature change: when entering a cold outdoor environment, controlling the second relay 26 to close activates the annular semiconductor cooling chip 12 to cool the lens 6; when entering a warm room, controlling the first relay 26 to close activates the PI heating film 3 to heat the lens 6, ensuring that the lens temperature is always close to the ambient temperature and avoiding water vapor condensation due to excessive temperature difference.

[0033] A method for defogging an external heating defogging structure for an optical lens includes the following steps: The mounting cover 10 is installed inside the clearance hole 9 to block the clearance hole 9. In addition, the heat insulation layer 11 is used to insulate the lens 6, so that the space between the heat insulation layer 11 inside the frame 1 and the lens 6 is sealed. The user inputs outdoor temperature and humidity parameters in advance on the terminal. The control module 24 accurately calculates the dew point based on these parameters, drives the annular semiconductor cooling chip 12 to cool, and then transmits the cooling energy evenly to the lens 6 through the copper foil heat-conducting pad 13, so that the temperature of the lens 6 approaches the dew point in advance. The temperature of the lens 6 is monitored in real time by the first temperature sensor 5 and the temperature is transmitted to the control module 24 to prevent the target temperature from falling below the dew point (target temperature = dew point temperature + 1-2℃, to prevent the lens temperature from falling below the dew point and causing fogging). After the temperature of lens 6 approaches the dew point, switch to heat preservation mode to prevent the temperature from dropping during the journey. When the device moves from a warm room to a cold outdoor environment, the temperature difference between lens 6 and the environment is greatly reduced, effectively preventing water vapor in the air from condensing quickly on the surface of lens 6. When cooling the lens 6, the heat from the hot surface of the annular semiconductor cooling chip 12 is transferred to the heat sink 8. The control module 24 starts the cooling fan 17. The cooling fan 17 blows outside air towards the conical part 16. After being guided by the side of the conical part 16, the air passes through the air outlet 15 and blows towards the heat sink 8 to dissipate heat and prevent the hot surface of the lens 6 from accumulating heat and causing the cold surface to fail to cool down.

[0034] This application uses a built-in power supply, which can be easily implemented by those skilled in the art through simple programming. This is common knowledge in the field. Furthermore, this application is mainly used to protect the structure, shape, and their combination. Therefore, this application will not explain the control method and circuit connection in detail.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An external heating defogging structure for an optical lens, characterized in that, include: The frame (1) has a lens (6) installed inside it. The mounting slot (7) is located on the inner wall near one end of the frame (1); The annular semiconductor cooling chip (12) is installed inside the mounting groove (7) to cool the lens (6) and reduce the temperature difference between the lens (6) and the outdoor environment. The cold side of the annular semiconductor cooling chip (12) is provided with a copper foil heat-conducting pad (13). The copper foil heat-conducting pad (13) is in contact with the lens (6) to uniformly transfer the cooling energy of the annular semiconductor cooling chip (12) to the lens (6). A connecting seat (21) is installed on the bottom side of the frame (1), and the connecting seat (21) is provided with a control mechanism for controlling the lens (6).

2. The optical lens external heating defogging structure according to claim 1, characterized in that: It also includes a heat sink (8), which is fixedly installed at the end of the frame (1). One end of the heat sink (8) is pressed against the side of the annular semiconductor cooling chip (12) for heat transfer and heat dissipation of the hot surface of the annular semiconductor cooling chip (12).

3. The optical lens external heating defogging structure according to claim 1, characterized in that: It also includes a fixing ring (4), which is fixedly connected to the inner wall of the frame (1), and the side of the lens (6) abuts against the side of the fixing ring (4).

4. The optical lens external heating defogging structure according to claim 3, characterized in that: The fixing ring (4) is provided with a first temperature sensor (5) for detecting the temperature of the lens (6), and the detection end of the first temperature sensor (5) is in contact with the lens (6).

5. The optical lens external heating defogging structure according to claim 4, characterized in that: It also includes a PI heating film (3), which is installed on the inner wall of the frame (1) and is used to heat the lens (6) to remove fog after heating the inside of the frame (1). The inner wall of the frame (1) is fixedly connected to a positioning ring (2) for positioning the PI heating film (3), and the PI heating film (3) is located between the positioning ring (2) and the fixing ring (4).

6. The optical lens external heating defogging structure according to claim 5, characterized in that: The control mechanism includes a detachable box (22), a sealing plate (23), a control module (24), a Bluetooth module (25), a first relay (26), and a second relay (27). The detachable box (22) is located at the bottom of the connecting seat (21). The sealing plate (23) is fixedly installed at the bottom of the detachable box (22). The control module (24), Bluetooth module (25), first relay (26) and second relay (27) are all fixedly installed on the inner wall of the detachable box (22). The first temperature sensor (5), Bluetooth module (25), first relay (26) and second relay (27) are all electrically connected to the control module (24). The first relay (26) is electrically connected to the PI heating film (3). The second relay (27) is electrically connected to the annular semiconductor refrigeration chip (12).

7. The optical lens external heating defogging structure according to claim 2, characterized in that: It also includes a mounting cover (10), the heat sink (8) has a clearance hole (9) inside, the mounting cover (10) is inserted into the clearance hole (9), and the surface of the mounting cover (10) is in contact with the inner wall of the clearance hole (9), and the interior of the mounting cover (10) is provided with a heat insulation layer (11) for heat insulation.

8. The optical lens external heating defogging structure according to claim 7, characterized in that: It also includes a mounting ring (14) fixedly connected to the side of the mounting cover (10), a cooling fan (17) for cooling the heat sink (8) is installed inside the mounting ring (14), and an air outlet (15) is provided on the mounting ring (14) for air outlet.

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